impassable vs reasonable

impassable

adj
  • Not usable as legal tender. 

  • Incapable of being overcome or surmounted. 

  • Incapable of being passed over, crossed, or negotiated. 

reasonable

adj
  • Not expensive; fairly priced. 

  • Just; fair; agreeable to reason. 

  • Satisfactory. 

  • Not excessive or immoderate; within due limits; proper. 

How often have the words impassable and reasonable occurred in a corpus of books? (source: Google Ngram Viewer )